Pre-beta: image download throttling

WindowsDesktopUtilities/UNTESTED/WinAudibleImageServer.cs

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+using System;
+using System.Collections.Generic;
+using System.Drawing;
+using Dinah.Core.Drawing;
+using FileManager;
+
+namespace WindowsDesktopUtilities
+{
+	public static class WinAudibleImageServer
+	{
+		private static Dictionary<PictureDefinition, Image> cache { get; } = new Dictionary<PictureDefinition, Image>();
+
+		public static Image GetImage(string pictureId, PictureSize size)
+		{
+			var def = new PictureDefinition(pictureId, size);
+			if (!cache.ContainsKey(def))
+			{
+				(var isDefault, var bytes) = PictureStorage.GetPicture(def);
+
+				var image = ImageReader.ToImage(bytes);
+				if (isDefault)
+					return image;
+				cache[def] = image;
+			}
+			return cache[def];
+		}
+	}
+}

WindowsDesktopUtilities/WindowsDesktopUtilities.csproj

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+<Project Sdk="Microsoft.NET.Sdk.WindowsDesktop">
+
+  <PropertyGroup>
+    <OutputType>Library</OutputType>
+    <TargetFramework>netcoreapp3.0</TargetFramework>
+    <UseWindowsForms>true</UseWindowsForms>
+    <ApplicationIcon />
+    <StartupObject />
+  </PropertyGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\..\Dinah.Core\Dinah.Core.WindowsDesktop\Dinah.Core.WindowsDesktop.csproj" />
+    <ProjectReference Include="..\FileManager\FileManager.csproj" />
+  </ItemGroup>
+
+</Project>